Imaging of a high-power millimeter-wave beam using a microwave gas breakdown initiated by a metal-dielectric screen

M. S. Gitlin; S. A. Bulanova; A. P. Fokin; M. Yu. Glyavin; A. A. Orlovsky; A. I. Tsvetkov

doi:10.1117/12.2580562

17 November 2020 Imaging of a high-power millimeter-wave beam using a microwave gas breakdown initiated by a metal-dielectric screen

M. S. Gitlin, S. A. Bulanova, A. P. Fokin, M. Yu. Glyavin, A. A. Orlovsky, A. I. Tsvetkov

Author Affiliations +

Proceedings Volume 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications; 1158211 (2020) https://doi.org/10.1117/12.2580562
Event: Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 2020, Tomsk, Russian Federation

Abstract

A technique for imaging of high-power millimeter-wave (MMW) beams using visible light emission from a surfaceinitiated microwave gas breakdown is discussed. A wave beam from pulsed 250 GHz gyrotron was imaged using a microwave gas breakdown initiated by a surface of a metal-dielectric screen. The screen was placed in a shallow metal chamber filled with helium with an admixture of argon. In the region, where MMW intensity was higher than the threshold intensity of the surface-initiated microwave gas breakdown, the intensity profile of a high-power MMW beam, which was obtained using this technique, was in good agreement with the data obtained using the thermographic technique.

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M. S. Gitlin, S. A. Bulanova, A. P. Fokin, M. Yu. Glyavin, A. A. Orlovsky, and A. I. Tsvetkov "Imaging of a high-power millimeter-wave beam using a microwave gas breakdown initiated by a metal-dielectric screen", Proc. SPIE 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 1158211 (17 November 2020); https://doi.org/10.1117/12.2580562

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